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    Question

    PQ is a line of length 18 cm. A point R is placed such

    that PR = 5 cm. If PR is increased by 40%, what percent does QR decrease?
    A 28.28% Correct Answer Incorrect Answer
    B 33.33% Correct Answer Incorrect Answer
    C 15.38% Correct Answer Incorrect Answer
    D 18.25% Correct Answer Incorrect Answer

    Solution

    ATQ,

    PQ = 18 cm

    PR = 5 cm

    Therefore, QR = 18 – 5 = 13 cm

    New PR = 1.40 × 5 = 7 cm

    New QR = 18 – 7 = 11 cm

    Percentage decrease = {(13 - 11)/13} × 100 = 15.38%

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